Endplate-preserving spinal implant having a roughened surface topography

Abstract

An interbody spinal implant including a body having a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, and single vertical aperture, as well as an integration plate having a roughened surface topography on its top surface.

What is claimed: 
     
         1 . An interbody spinal implant, comprising a body that is generally oval-shaped in transverse cross section, and comprises: a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having a posterior thickness greater than an anterior thickness, and having a blunt and radiused portion along the top of each lateral side and the top of the posterior portion, wherein the portion of the transverse rim that is not blunt and radiused has a roughened surface topography comprising metal particles, metal filings, metal shavings, metal powder, or combinations thereof, wherein the blunt and radiused portion does not include any roughened surface topography, and wherein the body has a sharp edge at the junction of the anterior portion and the top surface and at the junction of the anterior portion and the bottom surface. 
     
     
         2 . The interbody spinal implant of  claim 1 , wherein the body comprises metal. 
     
     
         3 . The interbody spinal implant of  claim 1 , wherein the body comprises a non-metal polymer. 
     
     
         4 . The interbody spinal implant of  claim 3 , wherein the non-metal polymer is selected from the group consisting of polyetherether-ketone, hedrocel, and ultra-high molecular weight polyethylene. 
     
     
         5 . The interbody spinal implant of  claim 1 , wherein the body comprises a composite of metal and a non-metal polymer. 
     
     
         6 . The interbody spinal implant of  claim 1 , wherein the body has at least one transverse aperture extending at least partially along the transverse length of the body. 
     
     
         7 . The interbody spinal implant of  claim 1 , wherein the spinal implant comprises a lordotic angle adapted to facilitate alignment of the spine. 
     
     
         8 . The interbody spinal implant of  claim 1 , further comprising bone graft material disposed in the substantially hollow center. 
     
     
         9 . The interbody spinal implant of  claim 8 , wherein the bone graft material is cancellous autograft bone, allograft bone, demineralized bone matrix (DBM), porous synthetic bone graft substitute, bone morphogenic protein (BMP), or a combination thereof. 
     
     
         10 . The interbody spinal implant of  claim 1 , wherein the metal particles, metal filings, metal shavings, metal powder, or combinations thereof are affixed to the top surface transverse rim and to the bottom surface transverse rim with an adhesive. 
     
     
         11 . The interbody spinal implant of  claim 1 , wherein the metal particles, metal fibers, metal powder, or combinations thereof are cold sprayed onto the top surface transverse rim and onto the bottom surface transverse rim. 
     
     
         12 . The interbody spinal implant of  claim 1 , wherein the metal particles, metal fibers, metal powder, or combinations thereof are thermal sprayed onto the top surface transverse rim and onto the bottom surface transverse rim. 
     
     
         13 . An interbody spinal implant, comprising:
 a body that is generally rectangular-shaped in transverse cross section, and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having an anterior thickness greater than a posterior thickness, and having a blunt and radiused portion along the top of each lateral side and the top of the anterior portion, wherein the portion of the transverse rim that is not blunt and radiused has a roughened surface topography comprising metal particles, metal filings, metal shavings, metal powder, or combinations thereof, wherein the blunt and radiused portion does not include any roughened surface topography, and wherein the body has a sharp edge at the junction of the posterior portion and the top surface and at the junction of the posterior portion and the bottom surface.   
     
     
         14 . The interbody spinal implant of  claim 13 , wherein the body comprises metal. 
     
     
         15 . The interbody spinal implant of  claim 13 , wherein the body comprises a non-metal polymer. 
     
     
         16 . The interbody spinal implant of  claim 15 , wherein the non-metal polymer is selected from the group consisting of polyetherether-ketone, hedrocel, and ultra-high molecular weight polyethylene. 
     
     
         17 . The interbody spinal implant of  claim 13 , wherein the body comprises a composite of metal and a non-metal polymer. 
     
     
         18 . The interbody spinal implant of  claim 13 , wherein the body has at least one transverse aperture extending at least partially along the transverse length of the body. 
     
     
         19 . The interbody spinal implant of  claim 13 , wherein the spinal implant comprises a lordotic angle adapted to facilitate alignment of the spine. 
     
     
         20 . The interbody spinal implant of  claim 13 , further comprising bone graft material disposed in the substantially hollow center. 
     
     
         21 . The interbody spinal implant of  claim 20 , wherein the bone graft material is cancellous autograft bone, allograft bone, demineralized bone matrix (DBM), porous synthetic bone graft substitute, bone morphogenic protein (BMP), or a combination thereof. 
     
     
         22 . The interbody spinal implant of  claim 13 , wherein the metal particles, metal filings, metal shavings, metal powder, or combinations thereof are affixed to the top surface transverse rim and to the bottom surface transverse rim with an adhesive. 
     
     
         23 . The interbody spinal implant of  claim 13 , wherein the metal particles, metal fibers, metal powder, or combinations thereof are cold sprayed onto the top surface transverse rim and onto the bottom surface transverse rim. 
     
     
         24 . The interbody spinal implant of  claim 13 , wherein the metal particles, metal fibers, metal powder, or combinations thereof are thermal sprayed onto the top surface transverse rim and onto the bottom surface transverse rim. 
     
     
         25 . An interbody spinal implant, comprising:
 a body that is generally curved-shaped in transverse cross section, and comprises a top surface, a bottom surface, opposing lateral sides, opposing anterior and posterior portions, a substantially hollow center, and a single vertical aperture extending from the top surface to the bottom surface, having maximum width at its center, and defining a transverse rim on the top surface and on the bottom surface, said transverse rim having an anterior thickness greater than a posterior thickness, and having a blunt and radiused portion along the top of each lateral side and the top of the anterior portion, wherein the portion of the transverse rim that is not blunt and radiused has a roughened surface topography comprising metal particles, metal filings, metal shavings, metal powder, or combinations thereof, wherein the blunt and radiused portion does not include any roughened surface topography, and wherein the body has a sharp edge at the junction of the posterior portion and the top surface and at the junction of the posterior portion and the bottom surface.   
     
     
         26 . The interbody spinal implant of  claim 25 , wherein the body comprises metal. 
     
     
         27 . The interbody spinal implant of  claim 25 , wherein the body comprises a non-metal polymer. 
     
     
         28 . The interbody spinal implant of  claim 27 , wherein the non-metal polymer is selected from the group consisting of polyetherether-ketone, hedrocel, and ultra-high molecular weight polyethylene. 
     
     
         29 . The interbody spinal implant of  claim 25 , wherein the body comprises a composite of metal and a non-metal polymer. 
     
     
         30 . The interbody spinal implant of  claim 25 , wherein the body has at least one transverse aperture extending at least partially along the transverse length of the body. 
     
     
         31 . The interbody spinal implant of  claim 25 , wherein the spinal implant comprises a lordotic angle adapted to facilitate alignment of the spine. 
     
     
         32 . The interbody spinal implant of  claim 25 , further comprising bone graft material disposed in the substantially hollow center. 
     
     
         33 . The interbody spinal implant of  claim 32 , wherein the bone graft material is cancellous autograft bone, allograft bone, demineralized bone matrix (DBM), porous synthetic bone graft substitute, bone morphogenic protein (BMP), or a combination thereof. 
     
     
         34 . The interbody spinal implant of  claim 25 , wherein the metal particles, metal filings, metal shavings, metal powder, or combinations thereof are affixed to the top surface transverse rim and to the bottom surface transverse rim with an adhesive. 
     
     
         35 . The interbody spinal implant of  claim 25 , wherein the metal particles, metal fibers, metal powder, or combinations thereof are cold sprayed onto the top surface transverse rim and onto the bottom surface transverse rim. 
     
     
         36 . The interbody spinal implant of  claim 25 , wherein the metal particles, metal fibers, metal powder, or combinations thereof are thermal sprayed onto the top surface transverse rim and onto the bottom surface transverse rim.